Suppression of explosion in pipelines with different blocking ratios by ultrafine water mist containing sodium chloride

JIA Hailin; XIANG Haijun; LI Dihui; ZHAI Rupeng

doi:10.11883/bzycj-2019-0268

Volume 40 Issue 4

Apr. 2020

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JIA Hailin, XIANG Haijun, LI Dihui, ZHAI Rupeng. Suppression of explosion in pipelines with different blocking ratios by ultrafine water mist containing sodium chloride[J]. Explosion And Shock Waves, 2020, 40(4): 042201. doi: 10.11883/bzycj-2019-0268

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JIA Hailin, XIANG Haijun, LI Dihui, ZHAI Rupeng. Suppression of explosion in pipelines with different blocking ratios by ultrafine water mist containing sodium chloride[J]. Explosion And Shock Waves, 2020, 40(4): 042201. doi: 10.11883/bzycj-2019-0268

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Suppression of explosion in pipelines with different blocking ratios by ultrafine water mist containing sodium chloride

doi: 10.11883/bzycj-2019-0268

JIA Hailin^{1, 2
,},
XIANG Haijun^{1, 2},
LI Dihui^{1, 2},
ZHAI Rupeng^{1, 2}

1.
State Key Laboratory Cultivation Base for Gas Geology and Gas Control, Henan Polytechnic University, Jiaozuo 454000, Henan, China
2.
School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, Henan, China

Received Date: 2019-07-10
Rev Recd Date: 2019-11-05

Available Online: 2020-03-25

Publish Date: 2020-04-01

Abstract

Abstract

This work aims at the explosion problem in long-distance gas pipelines. An experimental study on the influence of ultrafine water mist with NaCl on the gas explosion characteristics of pipes with different blocking ratios was carried out in a self-built horizontally transparent duct. Such effects are quantified via the analysis of pressure and flame speed. The results show that the explosion overpressure increases with the increase of the pipeline blocking ratio in such gas explosion of the pipeline that is only under the pressure relief ports with different blocking ratios (0, 0.2, 0.4 and 0.6). Under the action of ultrafine water mist, the blocking ratio varies nonlinear with the time of flame front movement propagation to the end of the pipe. When the blocking rate is 0.2, the average flame velocity is the highest. When the fog flux is 8.4 mL and mass fraction of NaCl in it is 8%, the ultrafine water mist containing NaCl has the best fire and explosion suppression effect as the maximum explosion pressure drops by 59.2%. The ultra-fine mist containing NaCl acts directly on the explosion flame to suppress the explosion.
- ultrafine water mist containing sodium chloride,
- gas explosion,
- blocking ratio,
- explosion pressure,
- flame propagation

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References

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